Anti-tnf-alpha polypeptide composition and use thereof

ABSTRACT

The invention provides a composition comprising an anti-tumor necrosis factor (TNF)-alpha polypeptide, wherein the composition produces a reduced level of immunogenicity when administered to a subject, as well as a treatment method involving the administration of the composition.

BACKGROUND OF THE INVENTION

Etanercept is a recombinant human tumor necrosis factor receptor p75Fcfusion protein. Etanercept is well established and widely used inclinical practice for about 15 years, with a well characterisedpharmacological, efficacy, and safety profile (Murray et al., Ann.Pharmacother., 31(11): 1335-1338 (1997); Goffet et al., J. Am. Acad.Dermatol., 49(2 Suppl): 5105-5111 (2003); Fuchs et al., Clin. Trials,1(3): 259-263 (2006)). Etanercept was originally approved for use inmoderate to severe rheumatoid arthritis (RA), and the therapeuticindications for etanercept have been stepwise extended and comprisetreatment of patients with polyarticular juvenile idiopathic arthritis,psoriatic arthritis, ankylosing spondylitis, psoriasis, and alsopaediatric psoriasis. Recently, etanercept also has been approved foruse in non-radiographic axial spondyloarthritis by the EMA (EnbrelSummary of Product Characteristics.www.ema.europa.eu/docs/en_GB/document_library/EPAR_-_Product_Information/human/000262/WC500027361.pdf(retrieved on Feb. 27, 2015)). The administration of etanercept has beenfound effective for treatment of some inflammatory diseases because itcan reduce the levels of the active form of TNF in a subject by bindingto TNF as a decoy receptor.

The administration of an anti-TNF-alpha polypeptide composition (e.g.,ENBREL™ etanercept composition (Amgen, Inc., Thousand Oaks, Calif.)) toa subject can produce immunogenicity against the composition (e.g., inthe form of anti-drug antibodies (ADA)) in the patient. Therefore, thereis a desire for an anti-TNF-alpha polypeptide composition that producesa reduced level of immunogenicity in subjects.

BRIEF SUMMARY OF THE INVENTION

The invention provides a composition comprising an anti-tumor necrosisfactor (TNF)-alpha polypeptide, wherein the composition produces areduced level of immunogenicity when administered to a subject.

In one embodiment, the anti-TNF-alpha polypeptide is a polypeptide thatis an extracellular ligand-binding portion of a human 75 kDa (p75) TNFRfused to an Fc region of a human IgG1, the composition produces areduced level of immunogenicity in the subject as compared to an ENBREL™etanercept composition with an equivalent concentration of theanti-TNF-alpha polypeptide, and the composition is prepared by a processcomprising (a) providing a mixture comprising the anti-TNF-alphapolypeptide and host cell proteins (HCP), (b) contacting the mixturewith a hydrophobic interaction chromatography (HIC) resin, such that theanti-TNF-alpha polypeptide binds to the HIC resin, and (c) eluting theanti-TNF-alpha polypeptide from the HIC resin, e.g., with an elutionbuffer.

The invention also provides a method of treating a disorder in which aTNF-alpha activity is detrimental in a subject comprising administeringa therapeutically effective amount of the composition to the subject.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 depicts a summary of patient disposition as described in Example3. A total of 777 patients were screened, and 181 patients were excludedmainly due to not meeting the exclusion criteria. Multiple screeningfailure reasons were possible. All patients randomized were included inthe full analysis set and the safety set. Of the 551 patients whocompleted 24 weeks of treatment 481 patients were included in theper-protocol set.

FIGS. 2A-2C are graphs depicting the American College of Rheumatology(ACR) response rates at Week 24 as described in Example 3. The adjustedtreatment difference and its 95% confidence interval (CI) were analyzedwith baseline C-reactive protein as a covariate and stratified byregion. FIG. 2A depicts ACR20 response rates of SB4 etanerceptcomposition (inventive) and ETN etanercept composition (ENBREL™etanercept composition) in the per-protocol set and full analysis set.FIG. 2B depicts ACR50 response rates of the SB4 and ETN etanerceptcompositions in the per-protocol set and full analysis set. FIG. 2Cdepicts ACR70 response rates of the SB4 and ETN etanercept compositionsin the per-protocol set and full analysis set.

FIG. 3 is a graph depicting estimated time-response curves of ACR20response rate up to Week 24 in the per-protocol set as described inExample 3.

FIGS. 4A-4C are graphs depicting efficacy endpoints at Week 24 in thefull analysis set as described in Example 3. FIG. 4A depicts a change inthe Disease Activity Score in 28 joints (DAS28). The LSMeans treatmentdifference was 0.072, and its 95% CI was −0.135 to 0.279. FIG. 4Bdepicts the European League Against Rheumatism (EULAR) response. FIG. 4Cdepicts the proportion of patients achieving a low disease activityscore (LDAS) defined as DAS28 (ESR) ≦3.2 and remission defined as DAS28(ESR) ≦2.6.

FIG. 5 is a graph depicting the mean (standard deviation) serum throughconcentration (C_(trough)) profile for the SB4 and ETN etanerceptcompositions.

FIG. 6 is a graph depicting the mean (standard deviation) serumconcentration profiles at Week 8 for the SB4 and ETN etanerceptcompositions.

DETAILED DESCRIPTION OF THE INVENTION

The invention provides a composition comprising an anti-tumor necrosisfactor (TNF)-alpha polypeptide, wherein the composition produces areduced level of immunogenicity when administered to a subject.

The anti-TNF-alpha polypeptide can be any suitable polypeptideincluding, but not limited to, an anti-TNF-alpha antibody or an antigenbinding fragment thereof or a tumor necrosis factor receptor (TNFR)-IgG.For example, the anti-TNF-alpha polypeptide can be selected from thegroup consisting of infliximab, etanercept, adalimumab, certolizumab,and golimumab. In one embodiment, the anti-TNF-alpha polypeptide is apolypeptide that is an extracellular ligand-binding portion of a human75 kDa (p75) TNFR fused to an Fc region of a human IgG1 (etanercept).

The composition comprising the anti-TNF-alpha polypeptide produces areduced level of immunogenicity in a subject administered theanti-TNF-alpha polypeptide as compared to a subject administered acorresponding reference drug composition with an equivalentconcentration of the anti-TNF-alpha polypeptide. For example, when theanti-TNF-alpha polypeptide is a polypeptide that is an extracellularligand-binding portion of a human p75 TNFR fused to an Fc region of ahuman IgG1 (etanercept), then the composition produces a reduced levelof immunogenicity in the subject as compared to an ENBREL™ etanerceptcomposition (commercially available from Amgen, Inc., Thousand Oaks,Calif.) with an equivalent concentration of the anti-TNF-alphapolypeptide.

A reduced level of immunogenicity resulting from the administration ofthe composition refers to a decreased immune response reaction againstthe composition when the composition is administered to the subject. Forexample, the decreased immune response reaction can be a reduced levelof anti-drug-antibodies (ADA) (i.e., antibodies against theanti-TNF-alpha polypeptide in the administered composition). When theanti-TNF-alpha polypeptide is a polypeptide that is an extracellularligand-binding portion of a human p75 TNFR fused to an Fc region of ahuman IgG1 (etanercept), then the level of ADA is reduced by about 50%or more (e.g., about 55% or more, about 60% or more, about 65% or more,about 70% or more, about 75% or more, about 80% or more, about 85% ormore, about 90% or more, about 91%, about 92%, about 93%, about 94%,about 95% or more) or by about 50-95% (e.g., about 50%, about 55%, about60%, about 65%, about 70%, about 75%, about 80%, about 85%, about 90%,about 95%, or a range between any of these values) as compared to theADA level in a subject administered an ENBREL™ etanercept compositionwith an equivalent concentration of the anti-TNF-alpha polypeptide.

The anti-TNF-alpha polypeptide for use in the composition (e.g.,etanercept) can be produced in a known manner by recombinant DNAtechnology in a Chinese hamster ovary (“CHO”) mammalian cell expressionsystem. Examples in the art for mammalian expression of etanercept aredescribed in U.S. Pat. Re36755; U.S. Pat. No. 5,605,690; U.S. Pat. No.7,294,481; U.S. Pat. No. 8,063,182; European Patent 0 417 563 B1; andEuropean Patent 0 464 533 B1.

The anti-TNF-alpha polypeptide can be purified by any suitable means.For example, the anti-TNF-alpha polypeptide can be purified byhydroxyapatite chromatography, gel electrophoresis, dialysis, affinitychromatography, fractionation on an ion exchange column, reverse phaseHPLC, chromatography on silica, chromatography on heparin,chromatography on an anion or cation exchange resin (e.g., apolyaspartic acid column), chromatofocusing, SDS-PAGE, ammonium sulfateprecipitation, and/or mixed mode chromatography (see, e.g., U.S. PatentApplication Publication 2014/0072560), i.e., any combination thereof.

Although not wishing to be bound by any particular theory, it isbelieved that the reduced level of immunogenicity that is characteristicof the composition is due at least in part to the process by which thecomposition is purified.

In one embodiment, the composition is prepared by a process comprising(a) providing a mixture comprising the anti-TNF-alpha polypeptide andimpurities (e.g., host cell proteins (HCP)), (b) contacting the mixturewith a hydrophobic interaction chromatography (HIC) resin, such that theanti-TNF-alpha polypeptide binds to the HIC resin, and (c) eluting theanti-TNF-alpha polypeptide from the HIC resin with an elution buffer. Inother words, the HIC is performed in bind-elution mode (wherein theproduct to be purified is bound to the HIC resin and subsequently elutedfrom the HIC resin).

The HIC resin can be any suitable resin. Exemplary HIC resins include,but are not limited to, Phenyl Sepharose 6 FF (High Sub), CAPTO™ Phenyl,CAPTO™ Butyl, CAPTO™ Phenyl ImpRes, and CAPTO™ Butyl ImpRes resin.

The HIC bind-elution mode provides for the removal of impurities, suchas HCP, misfolded and truncated forms of the anti-TNF-alpha polypeptide,aggregates of the anti-TNF-alpha polypeptide, and other impurities(e.g., insulin, detergents, etc.). In one embodiment, the mixture ofstep (a), i.e., prior to contacting the mixture with a HIC resin,contains 8.0 ng/L or less (e.g., 7.5 ng/L or less, about 7 ng/L or less,about 6 ng/L or less, about 5.5 ng/L or less, about 5 ng/L or less,about 4.5 ng/L or less, or about 4 ng/L or less) of HCP.

The anti-TNF-alpha polypeptide is eluted from the HIC resin in a mannerthat recovers the anti-TNF-alpha polypeptide while desirably leaving asignificant proportion, preferably most or all, of the aggregates (e.g.,multimers such as dimers) of anti-TNF-alpha polypeptide, as well asmisfolded anti-TNF-alpha polypeptides (including anti-TNF-alphapolypeptides with scrambled regions (e.g., disulfide scrambled regions)optionally bound to other proteins), bound or adhered to the HIC resin.In such a way, a significant proportion, preferably most or all, of theaggregates (e.g., multimers such as dimers) of the anti-TNF-alphapolypeptide, as well as misfolded anti-TNF-alpha polypeptides (includinganti-TNF-alpha polypeptides with scrambled regions (e.g., disulfidescrambled regions) optionally bound to other proteins), in the mixtureare separated from the anti-TNF-alpha polypeptide.

The anti-TNF-alpha polypeptide can be eluted from the HIC resin,typically an HIC resin column, using any suitable elution buffer. In oneembodiment, the elution buffer contains about 250-400 mM (e.g., about250 mM, about 270 mM, about 290 mM, about 300 mM, about 320 mM, about350 mM, about 370 mM, about 400 mM, or a range between any of thesevalues) ammonium sulfate or sodium sulfate. Alternatively, the elutionbuffer comprises a high concentration of salt, such as about 450-750 mM(e.g., about 450 mM, about 480 mM, about 500 mM, about 520 mM, about 550mM, about 570 mM, about 600 mM, about 620 mM, about 650 mM, about 670mM, about 700 mM, about 720 mM, about 750 mM, or a range between any ofthese values) NaCl or ammonium chloride.

Additionally, the elution buffer comprises about 10-200 mM (e.g., about10 mM, about 20 mM, about 30 mM, about 40 mM, about 50 mM, about 60 mM,about 70 mM, about 80 mM, about 90 mM, about 100 mM, about 110 mM, about120 mM, about 130 mM, about 140 mM, about 150 mM, about 160 mM, about170 mM, about 180 mM, about 190 mM, about 200 mM, or a range between anyof these values) of a pH modifying agent, such as sodium acetate, sodiumcitrate, or phosphate.

The pH of the elution buffer can be about pH 3-7 (e.g., about pH 3,about pH 3.5, about pH 4, about pH 4.5, about pH 5, about pH 5.5, aboutpH 6, about pH 6.5, about pH 7, or a range between any of these values.Preferably, the pH of the elution buffer is about 4.5-6.5 (e.g., aboutpH 4.5, about pH 4.7, about pH 5, about pH 5.2, about pH 5.5, about pH5.7, about pH 6, about pH 6.2, about pH 6.5, or a range between any ofthese values).

The elution buffer can have any suitable conductivity. In oneembodiment, the conductivity of the elution buffer is in a range ofabout 40-70 mS/cm (e.g., about 40 mS/cm, about 45 mS/cm, about 50 mS/cm,about 55 mS/cm, about 60 mS/cm, about 65 mS/cm, about 70 mS/cm, or arange between any of these values). Preferably, the conductivity of theelution buffer is less than about 65 mS/cm (e.g., about 45-60 mS/cm).

The preparation process further can comprise one or more (one, two,three, four, or five) wash steps prior to the elution step. The one ormore wash steps can be performed with any suitable wash buffer. In oneembodiment, the wash buffer comprises about 500-800 mM (e.g., about 500mM, about 540 mM, about 550 mM, about 570 mM, about 600 mM, about 620mM, about 650 mM, about 680 mM, about 700 mM, about 720 mM, about 750mM, about 800 mM, or a range between any of these values) ammoniumsulfate or sodium sulfate. Alternatively, the wash buffer comprisesabout 1000-1500 mM (e.g., about 1000 mM, about 1100 mM, about 1200 mM,about 1300 mM, about 1400 mM, about 1500 mM, or a range between any ofthese values) NaCl or ammonium chloride.

Additionally, the wash buffer comprises about 10-200 mM (e.g., about 10mM, about 20 mM, about 30 mM, about 40 mM, about 50 mM, about 60 mM,about 70 mM, about 80 mM, about 90 mM, about 100 mM, about 110 mM, about120 mM, about 130 mM, about 140 mM, about 150 mM, about 160 mM, about170 mM, about 180 mM, about 190 mM, about 200 mM, or a range between anyof these values) of a pH modifying agent, such as sodium acetate, sodiumcitrate, or phosphate.

The pH of the wash buffer can be about pH 3-7 (e.g., about pH 3, aboutpH 3.5, about pH 4, about pH 4.5, about pH 5, about pH 5.5, about pH 6,about pH 6.5, about pH 7, or a range between any of these values).Preferably, the pH of the wash buffer is about 4.5-6.5 (e.g., about pH4.5, about pH 4.7, about pH 5, about pH 5.2, about pH 5.5, about pH 5.7,about pH 6, about pH 6.2, about pH 6.5, or a range between any of thesevalues).

When the wash step is performed, the conductivity of the wash bufferdesirably is greater than the conductivity of the elution buffer.Additionally, the molarity of the sum of the components of the washbuffer desirably is greater than the molarity of the sum of thecomponents of the elution buffer (i.e., the molarity of the elutionbuffer is lower than the molarity of the wash buffer).

As a result of the HIC bind-elution mode, misfolded and aggregated formsof the anti-TNF-alpha polypeptide are removed from the solutioncomprising the anti-TNF-alpha polypeptide. As described in Example 1,the misfolded and aggregated forms of the anti-TNF-alpha polypeptidebind to the HIC resin and then are retained in the HIC resin afterelution of the anti-TNF-alpha polypeptide from the HIC resin. Therefore,the resulting composition comprising the anti-TNF-alpha polypeptide hasa reduced concentration of misfolded and aggregated forms of theanti-TNF-alpha polypeptide as compared to the concentration of misfoldedand aggregated forms of the anti-TNF-alpha polypeptide present in thereference drug composition.

In one embodiment, the anti-TNF-alpha polypeptide is a polypeptide thatis an extracellular ligand-binding portion of a human p75 TNFR fused toan Fc region of a human IgG1 (etanercept), and the concentration of highmolecular weight (HMW) compounds, typically consisting of aggregates(multimer (e.g., dimer) forms of etanercept), and/or the concentrationof misfolded and aggregated forms of etanercept in the resultingcomposition is reduced by about 50% or more (e.g., about 55% or more,about 60% or more, about 65% or more, about 70% or more, about 75% ormore, about 80% or more, about 85% or more, about 90% or more, about91%, about 92%, about 93%, about 94%, about 95% or more, or a rangebetween any of these values) or about 50-95% (e.g., about 50%, about55%, about 60%, about 65%, about 70%, about 75%, about 80%, about 85%,about 90%, about 95%, or a range between any of these values) ascompared to the concentration of HMW compounds and/or the concentrationof misfolded and aggregated forms of etanercept in the ENBREL™etanercept composition.

When high performance liquid chromatography (HPLC), such as hydrophobicinteraction HPLC (HI-HPLC), is performed on a sample of the composition,three peaks typically are observed. As described in Example 1, Peaks 1and 3 correspond to impurities, including truncated anti-TNF-alphapolypeptides (Peak 1), misfolded anti-TNF-alpha polypeptides (includinganti-TNF-alpha polypeptides with scrambled regions (e.g., disulfidescrambled regions) optionally bound to other proteins) (Peak 3), andaggregates (e.g., multimers such as dimers) of the anti-TNF-alphapolypeptide (Peak 3), while Peak 2 corresponds to the anti-TNF-alphapolypeptide. While U.S. Patent Application Publication 2014/0072560describes an HIC analysis of etanercept compositions produced accordingto a mixed mode chromatography method, the three peaks described therein(see, e.g., paragraph 0100 thereof), as well as in U.S. Pat. No.7,294,481 (see, e.g., column 22, lines 13-66, and FIG. 5 thereof) aresimilar to Peaks 1, 2, and 3 described herein.

In one embodiment, the composition contains a Peak 3 amount of about 12wt. % or less (e.g., about 11.8 wt. % or less, about 11.5 wt. % or less,about 11.2 wt. % or less, about 11 wt. % or less, about 10.8 wt. % orless, about 10.5 wt. % or less, about 10.2 wt. % or less, about 10 wt. %or less, about 9.8 wt. % or less, about 9.5 wt. % or less, about 9.2 wt.% or less, about 9 wt. % or less, about 8.8 wt. % or less, about 8.5 wt.% or less, about 8.2 wt. % or less, about 8 wt. % or less, about 7.8 wt.% or less, about 7.5 wt. % or less, about 7.2 wt. % or less, about 7 wt.% or less, about 6.8 wt. % or less, about 6.5 wt. % or less, about 6.2wt. % or less, about 6 wt. % or less, about 5.8 wt. % or less, about 5.5wt. % or less, about 5.2 wt. % or less, about 5 wt. % or less, about 4.8wt. % or less, about 4.5 wt. % or less, about 4.2 wt. % or less, about 4wt. % or less, about 3.8 wt. % or less, about 3.5 wt. % or less, about3.2 wt. % or less, or a range between any of these values) when HPLC isperformed on a sample of the composition. Preferably, the compositioncontains a Peak 3 amount in a range of about 3.5-7 wt. % (e.g., about3.5 wt. %, about 3.8 wt. %, about 4 wt. %, about 4.2 wt. %, about 4.5wt. %, about 4.7 wt. %, about 5 wt. %, about 5.2 wt. %, about 5.3 wt. %,about 5.5 wt. %, about 5.7 wt. %, about 6 wt. %, about 6.2 wt. %, about6.5 wt. %, about 6.7 wt. %, about 7 wt. %, or a range between any ofthese values). In one embodiment, the composition contains a Peak 3amount in a range of about 3.8-7.1 wt. %.

When the anti-TNF-alpha polypeptide is a polypeptide that is anextracellular ligand-binding portion of a human p75 TNFR fused to an Fcregion of a human IgG1 (etanercept), then the Peak 3 amount contained inthe composition is reduced by about 50% or more (e.g., about 55% ormore, about 60% or more, about 65% or more, about 70% or more, about 75%or more, about 80% or more, about 85% or more, about 90% or more, about91%, about 92%, about 93%, about 94%, about 95% or more) or by about50-95% (e.g., about 50%, about 55%, about 60%, about 65%, about 70%,about 75%, about 80%, about 85%, about 90%, about 95%, or a rangebetween any of these values) as compared to the Peak 3 amount containedin the ENBREL™ etanercept composition with an equivalent concentrationof the anti-TNF-alpha polypeptide when the composition and the ENBREL™etanercept composition are subjected to HPLC under the same conditions.

In another embodiment, the composition contains a Peak 2 amount of about85 wt. % or more (e.g., about 86 wt. % or more, about 87 wt. % or more,about 88 wt. % or more, about 89 wt. % or more, about 90 wt. % or more,about 91 wt. % or more, about 92 wt. % or more, about 93 wt. % or more,about 94 wt. % or more, or a range between any of these values) whenHPLC is performed on a sample of the composition.

The preparation process also can include ion (anion or cation) exchangechromatography, affinity chromatography, virus inactivation, and thelike to further purify the anti-TNF-alpha polypeptide. The ion exchangechromatography can be flow-through or bind-elute mode. Any suitable ionexchange resin can be used. Exemplary ion exchange resins (i.e.,chromatographic separation mediums) include, but are not limited to,HiTrap SP Sepharose FF, HiTrap CM Sepharose FF, CAPTO™ SP Impres, HiTrapSP HP, SOURCE 30S, HiperCel Sorbent S, CM Ceramic Hiper D, S CeramicHiper D, ESHMUNO S, FRACTOGEL™ EMD S (M), FRACTOGEL™ EMD S (S),FRACTOGEL™ EMD SE HiCap resin, FRACTOGEL™ TMEA HiCap, Nuvia S, UNOsphereS, Macro-Prep CM, and Macro-Prep S resin.

Thus, in one embodiment, the preparation process additionally comprisessteps (a1)-(a4), which are performed prior to step (b) (contacting themixture with the HIC resin): (a1) contacting the mixture with an ion(e.g., cation or anion) exchange resin in the presence of a load buffer,(a2) collecting a flow-through fraction containing the anti-TNF-alphapolypeptide, wherein the anti-TNF-alpha polypeptide is unbound to theion exchange resin, (a3) applying a wash buffer and collecting a washfraction, and (a4) pooling the flow-through fraction and the washfraction.

Example 1 provides an exemplary description of the anti-TNF-alphapolypeptide purification process.

The composition can contain any suitable amount of the anti-TNF-alphapolypeptide. In one embodiment, the composition comprises about 10 mg/mLto about 100 mg/mL (e.g., about 20 mg/mL, about 30 mg/mL, about 40mg/mL, about 50 mg/mL, about 60 mg/mL, about 70 mg/mL, about 80 mg/mL,about 90 mg/mL, or a range between any of these values) ofanti-TNF-alpha polypeptide. Preferably, the composition comprises about50 mg/mL of anti-TNF-alpha polypeptide.

The composition of anti-TNF-alpha polypeptide also can comprise acarrier, such as a pharmaceutically acceptable carrier or excipient thatis conventional in the art and which is suitable for administration intoa subject for therapeutic, diagnostic, or prophylactic purposes. Theterm “composition” (e.g., pharmaceutical composition) refers to acomposition comprising an anti-TNF-alpha polypeptide prepared such thatit is suitable for injection and/or administration into a subject inneed thereof. In certain embodiments, the compositions provided hereinare substantially sterile and do not contain any agents that are undulytoxic or infectious to the recipient. Further, as used herein, asolution or aqueous composition may mean a fluid (liquid) preparationthat contains one or more chemical substances dissolved in a suitablesolvent (e.g., water and/or other solvent, e.g., organic solvent) ormixture of mutually miscible solvents.

Such pharmaceutically acceptable carriers and excipients include, butare not limited to, additives that stabilize the polypeptide while insolution (or in dried or frozen forms), polymers, amino acids,surfactants, buffers, and combinations thereof. Suitablepharmaceutically acceptable carriers and excipients include, but are notlimited to water, buffers (e.g., sodium phosphate, histidine, potassiumphosphate, sodium or potassium citrate, maleic acid, ammonium acetate,tris-(hydroxymethyl)-aminomethane (tris), acetate, diethanolamine, or acombination thereof), sugars (e.g., sucrose, lactose, glycerol, xylitol,sorbitol, mannitol, maltose, inositol, trehalose, glucose, or acombination thereof), polymers (e.g., bovine serum albumin (BSA), humanSA or recombinant HA, dextran, polyvinyl alcohol (PVA), hydroxypropylmethylcellulose (HPMC), polyethyleneimine, gelatin, polyvinylpyrrolidone(PVP), hydroxyethylcellulose (HEC)), non-aqueous solvents (e.g.,polyethylene glycol, ethylene glycol, glycerol, dimethysulfoxide (DMSO)and dimethylformamide (DMF)), amino acids (e.g., proline, L-serine,sodium glutamic acid, alanine, glycine, lysine hydrochloride, sarcosine,gamma-aminobutyric acid), surfactants (e.g., TWEEN™-20, TWEEN™-80, SDS,polysorbate, and polyoxyethylene copolymer), and miscellaneousexcipients (e.g., potassium phosphate, sodium acetate, ammonium sulfate,magnesium sulfate, sodium sulfate, trimethylamine N-oxide, betaine, zincions, copper ions, calcium ions, manganese ions, magnesium ions, CHAPS,sucrose monolaurate, 2-O-beta-mannoglycerate or a combination thereof.

The concentration of one or more carriers or excipients in thecomposition is about 0.0001 wt. % to about 5 wt. % (e.g., about 0.0001wt. %, about 0.001 wt. %, about 0.01 wt. %, about 0.1 wt. %, about 0.5wt. %, about 1 wt. %, about 1.5 wt. %, about 2 wt. %, about 2.5 wt. %,about 3 wt. %, about 3.5 wt. %, about 4 wt. %, about 4.5 wt. %, about 5wt. %, or a range between any of these values).

In one embodiment, the composition comprises sucrose at a concentrationof from about 0.5 wt. % to about 1.5 wt. % (e.g., 0.5 wt. %, 0.6 wt. %,0.7 wt. %, 0.8 wt. %, 0.9 wt. %, 1 wt. %, 1.1 wt. %, 1.2 wt. %, 1.3 wt.%, 1.4 wt. %, 1.5 wt. %, or a range between any of these values) andpreferably about 1 wt. %. The composition alternatively or additionallycan comprise sodium phosphate at a concentration of about 5-15 mM (e.g.,5 mM, 6 mM, 7 mM, 8 mM, 9 mM, 10 mM, 11 mM, 12 mM, 13 mM, 14 mM, 15 mM,or a range between any of these values) and preferably about 10 mM. Thecomposition alternatively or additionally can comprise sodium chlorideat a concentration of about 100-200 mM (e.g., 100 mM, 110 mM, 120 mM,130 mM, 140 mM, 150 mM, 160 mM, 170 mM, 180 mM, 190 mM, 200 mM, or arange between any of these values) and preferably about 140 mM.

The composition can have any suitable pH. For example, the compositioncan have a pH of about 5.5 to about 7.8 and preferably has a pH of about5.8 to about 6.5 (e.g., a pH of 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5,or a range between any of these values). In one embodiment, thecomposition has a pH of 6.2.

In one embodiment, the composition comprises, consists essentially of,or consists of a composition comprising about 50 mg/mL of anti-TNF-alphapolypeptide, about 10 mM sodium phosphate, about 140 mM sodium chloride,and about 1 wt. % sucrose at a pH of about 6.2.

The composition is suitable for administration to a subject by anysuitable mode of administration including, but not limited to, oral,aerosol, parenteral (e.g., subcutaneous, intravenous, intraarterial,intramuscular, intradermal, interperitoneal, introcerebrospinal,intrasynovial, and intrathecal), rectal, and vaginal administration.Parenteral administration can be by bolus injection or continuousinfusion. Compositions for injection may be presented in unit dosageform, e.g., in ampoules or in multi-dose containers, with an addedpreservative.

Additionally, the composition is suitable or administration usingInject-ease GENJECT™ injector, injector pens such as the GENPEN™injector pen, and needleless devices such as the MEDIJECTOR™ device andthe BIOJECTOR™ device. In one embodiment, the composition is suitablefor parental administration and is packaged in a pre-filled syringe.Preferably, the composition is suitable for subcutaneous injection.

In another embodiment, the composition is formulated as a depotpreparation. Such long acting compositions may be administered byimplantation (for example subcutaneously or intramuscularly) or byintramuscular injection. Thus, for example, the composition can bemodified with suitable polymeric or hydrophobic materials (e.g., as anemulsion in an acceptable oil) or ion exchange resins, or as sparinglysoluble derivatives, for example, as a sparingly soluble salt.

In yet another embodiment, the composition is presented in a vial, pack,or dispenser device that contains one or more unit dosage formscontaining the anti-TNF-alpha polypeptide. The dispenser device cancomprise a syringe having a single dose of the liquid composition readyfor injection. The syringe can be accompanied by instructions foradministration. The invention also provides a kit or container thatcomprises the composition (e.g., in aqueous form). The kit also can beaccompanied by instructions for use.

The subject to be administered the composition can be any suitablesubject. The subject can be a mammal, such as a mouse, rat, guinea pig,hamster, rabbit, cat, dog, pig, cow, horse, or primate (e.g., human) Inone embodiment, the subject has, or is at risk for having, a disorder inwhich TNF-alpha activity is detrimental.

In this regard, the invention provides a method of treating a disorderin which TNF-alpha activity is detrimental in a subject comprisingadministering a therapeutically effective amount of the composition tothe subject.

The disorder in which TNF-alpha activity is detrimental in a subjectincludes, but is not limited to, rheumatoid arthritis, plaque psoriasis,psoriatic arthritis, polyarticular juvenile idiopathic arthritis (JIA),ankylosing spondylitis, Wegener's disease (granulomatosis), Crohn'sdisease (or inflammatory bowel disease), chronic obstructive pulmonarydisease (COPD), hepatitis C, endometriosis, asthma, cachexia, psoriasis,or atopic dermatitis, or other inflammatory or autoimmune-relatedillness, disorder, or condition. Additional disorders that can betreated with the anti-TNF-alpha polypeptide are described inInternational Patent Application Publication WO 2000/062790,International Patent Application Publication WO 2001/062272, and U.S.Patent Application Publication 2011/0021380.

In one embodiment, the disorder to be treated is selected from the groupconsisting of polyarticular JIA, psoriatic arthritis, plaque psoriasis,and ankylosing spondylitis. In another embodiment, the disorder to betreated is rheumatoid arthritis.

The term “treating” refers to administration or application of remediesfor a disorder in a subject and includes inhibiting the disorder,arresting development of the disorder, relieving the disorder (forexample, by causing regression, or restoring or repairing a lost,missing, or defective function) or stimulating an inefficient process.The term includes obtaining a desired pharmacologic and/or physiologiceffect and covering any treatment of a pathological condition ordisorder in a subject. The term encompasses a therapeutic effect interms of a partial or complete cure for a disorder and/or adverse effectattributable to the disorder. Treating includes inhibiting the disorder,such as arresting its development, stopping or terminating the disorderor at least its associated symptoms, so that the subject no longersuffers from the disorder or its symptoms, such as causing regression ofthe disorder or its symptoms, for example, by restoring or repairing alost, missing or defective function, or stimulating an inefficientprocess, or relieving, alleviating or ameliorating the disorder, orsymptoms associated therewith, where ameliorating is used in a broadsense to refer to at least a reduction in the magnitude of a parameter,such as inflammation, pain and/or tumor size.

Administration of the composition to a subject can also be prophylactic.The term “preventing” encompasses complete or partial prevention of adisorder or symptom thereof, i.e., preventing the disorder fromoccurring or recurring in a subject who may be predisposed to thedisorder but is not yet symptomatic.

The appropriate dosage, or therapeutically effective amount, of theanti-TNF-alpha polypeptide will depend on the condition to be treated,the severity of the condition, prior therapy, and the subject's clinicalhistory and response to the anti-TNF-alpha polypeptide. The proper dosecan be adjusted according to the judgment of the attending physiciansuch that it can be administered to the subject one time or over aseries of administrations. The composition can be administered as a soletherapeutic or in combination with additional therapies as needed.

In certain embodiments, the effective anti-TNF-alpha polypeptide amountper adult dose ranges from about 1-500 mg/m², or from about 1-200 mg/m²,or from about 1-40 mg/m² (e.g., about 1 mg/m², about 5 mg/m², about 10mg/m², about 15 mg/m², about 20 mg/m², about 25 mg/m², about 30 mg/m²,about 35 mg/m², about 40 mg/m², or a range between any of these values)or about 5-25 mg/m². Alternatively, one dose can be administered, whoseamount can range from 2-500 mg/dose, 2-100 mg/dose, or from about 10-80mg/dose (e.g., about 10 mg/dose, about 20 mg/dose, about 30 mg/dose,about 40 mg/dose, about 50 mg/dose, about 60 mg/dose, about 70 mg/dose,about 80 mg/dose, or a range between any of these values). If the doseis to be administered more than one time per week, an exemplary doserange is the same as the foregoing described dose ranges or lower andpreferably administered two or more times per week at a per dose rangeof 25-100 mg/dose.

In other embodiments, an acceptable dose for administration by injectioncontains about 80-100 mg/dose (e.g., about 80 mg/dose, about 90 mg/dose,or about 100 mg/dose). The dose can be administered at biweekly, weeklydoses, or separated by several weeks (for example 2 to 8 weeks, e.g., 2weeks, 3 weeks, 4 weeks, 5 weeks, 6 weeks, 7 weeks, or 8 weeks).

In some instances, an improvement in an subject's disorder can beobtained by a dose of up to about 100 mg of the composition one to threetimes per week over a period of at least three weeks, though treatmentfor longer periods may be necessary to induce the desired degree ofimprovement. For incurable chronic conditions the regimen may becontinued indefinitely. For pediatric individuals (ages 2-17), asuitable regimen involves a dose of about 0.4 mg/kg to 5 mg/kg (about0.4 mg/kg, about 0.5 mg/kg, 0.8 mg/kg, about 1 mg/kg, about 2 mg/kg,about 3 mg/kg, about 4 mg/kg, about 5 mg/kg, or a range between any ofthese values) of the anti-TNF-alpha polypeptide, administered one ormore times per week.

The composition can be administered to the subject alone or incombination (e.g., sequential or simultaneous administration) withanother active agent, such as infliximab (REMICADE™), etanercept(ENBREL™), adalimumab (HUMIRA™), certolizumab (CIMZIA™), golimumab(SIMPONI™), methotrexate (MTX), or combinations thereof.

The following examples further illustrate the invention but, of course,should not be construed as in any way limiting its scope.

Example 1

This example describes a procedure for the preparation, particularlypurification, of an SB4 etanercept composition, with a lowerconcentration of impurities (e.g., HCP and/or high molecular weightcompounds (HMW), such as aggregates of etanercept, as well as misfoldedforms of etanercept (mainly consisting of incorrect intra- orinter-disulfide bonds or aggregates) than the ENBREL™ etanerceptcomposition.

The purification process comprises hydrophobic interactionchromatography (HIC), as well as possibly one or more of the followingsteps: ion (anion or cation) exchange chromatography, affinitychromatography, virus inactivation, and the like.

HIC is performed for removal of impurities such as HCP, Protein Aleachates, misfolded and truncated forms, and aggregates. A resin suchas Phenyl Sepharose 6 FF (high sub) can be used as the chromatographicseparation medium and operated in bind-elute mode.

HIC can include one or more of the following steps: an equilibrationstep, a load step, a wash step, and an elution step.

The equilibration step equilibrates the resin to specified pH andosmolality to enable SB4 etanercept to bind. A buffer containing, forexample, (a) about 0.7-1.7 M ammonium sulfate or sodium sulfate or about1-3 M NaCl or ammonium chloride and (b) about 10-200 mM (e.g., 10-100mM) sodium acetate, sodium citrate, or phosphate, pH 3.0-7.0, can beused.

The load step applies the SB4 etanercept mixture to the column allowingSB4 etanercept to bind while some impurities flow through.

To remove truncated forms of SB4 etanercept (HIC Peak 1), a wash step iscarried out after the column is loaded. The wash step removes truncatedforms of etanercept (HIC Peak 1) while retaining the target product (HICPeak 2). The wash buffer can comprise (a) about 540-700 mM or about1100-1500 mM NaCl or ammonium chloride and (b) about 10-200 mM sodiumacetate, sodium citrate, or phosphate and have a pH of about 3-7.

The elution step elutes SB4 etanercept from the adsorbent with, forexample, an elution buffer, while retaining process- and product-relatedimpurities (HIC Peak 3) on the adsorbent. Reducing the osmolality duringthe elution phase allows SB4 etanercept to be collected in the effluent.Multimer forms of entanercept (HMW) and misfolded and aggregated formsof etanercept, both of which correspond to HIC Peak 3, remain bound tothe HIC resin. The elution buffer can contain (a) about 250-350 mMammonium sulfate or sodium sulfate or about 480-670 mM NaCl or ammoniumchloride and (b) about 10-200 mM sodium acetate, sodium citrate, orphosphate and have a pH of about pH 3-7 and a conductivity of about45-65 mS/cm.

Following the purification process, the SB4 etanercept composition haslower levels of impurities as compared to the ENBREL™ etanerceptcomposition as shown in Table 1. In particular, the SB4 etanerceptcomposition has a lower concentration of high molecular weight compounds(HMW) (mainly consisting of multimer forms of etanercept and aggregates)and a lower concentration of misfolded or aggregated forms of etanercept(mainly consisting of incorrect intra- or inter-disulfide bonds oraggregates) (Peak 3) as compared to the ENBREL™ etanercept compositionwhen HPLC is performed.

By following the foregoing purification steps, and the SB4 etanerceptcomposition immediately following HIC can have a Peak 3 amount in therange of about 3.5-12 wt. % (e.g., about 3.8-7.1 wt. %), while the finalSB4 etanercept composition can have a Peak 3 amount in the range ofabout 5.2-5.3 wt. %. The results of size-exclusion (SE)-HPLC andhydrophobic interaction (HI)-HPLC analyses performed on a SB4 etanerceptcomposition prepared using the foregoing purification process andcommercially available ENBREL™ etanercept compositions are set forth inTable 1.

TABLE 1 SB4 and ETN etanercept composition analyses SB4 EtanerceptComposition ENBREL ™ Etanercept Composition Sample Sample 1 Sample 2Sample 3 Assay Units (N = 3) (N = 3) (N = 3) (N = 3) SE-HPLC wt. % HMW1.8-2.2 2.7-3.1 2.0-3.2 2.5-3.9 HI-HPLC wt. % Peak 3 5.2-5.3 13.5-13.615.1-17.5 14.2-14.8

Example 2

This example provides materials and methods for the study described inExample 3.

Patients

Patients aged 18-75 years who have been diagnosed with rheumatoidarthritis (RA) according to the revised 1987 American College ofRheumatology (ACR) criteria for ≧6 months and ≦15 years prior toscreening were eligible for the study. Patients had to have activedisease defined as: ≧6 swollen and ≧6 tender joints and eithererythrocyte sedimentation rate (ESR) ≧28 mm/h or serum C-reactiveprotein (CRP) ≧1.0 mg/dL despite MTX treatment for ≧6 months (stabledose of 10-25 mg/week for ≧4 weeks prior to screening). Non-steroidalanti-inflammatory drugs and oral glucocorticoids (equivalent to ≦10 mgprednisolone) were permitted if received at a stable dose for ≧4 weeksprior to randomisation.

Major exclusion criteria consisted of previous treatment with anybiological agents, history of lymphoproliferative disease, congestiveheart failure (New York Heart Association Class III/IV), ordemyelinating disorders, diagnosis of active tuberculosis (TB), andpregnancy or breastfeeding at screening.

Study Design

This Phase III, randomised, double-blind, parallel group study wasconducted at 73 centers across 10 countries in Europe, Latin America,and Asia. Patients were randomized in a 1:1 ratio to receive 50 mg ofeither SB4 etanercept composition or ENBREL™ etanercept composition(ETN) once-weekly for up to 52 weeks via subcutaneousself-administration. All patients had to take methotrexate (MTX) (10-25mg/week) and folic acid (5-10 mg/week) during the study. This reportrepresents efficacy data up to 24 weeks of treatment and safety data upto the 24-week interim report data cut off point (Jul. 21, 2014).

Study Endpoints

The primary endpoint was to demonstrate equivalence between SB4 and ETNetanercept compositions at Week 24, in terms of ACR20 response rate.Other efficacy endpoints were the ACR50 and ACR70 responses, change inthe disease activity score based on a 28 joint count (DAS28), and theEULAR response. Safety endpoints included incidence of adverse events(AEs) and serious adverse events (SAEs).

Blood samples for PK analyses were collected from a subset of patients(PK population) at designated study sites. Key PK endpoints includedserum trough concentration (C_(trough)) and area under theconcentration-time curve during the dosing interval (AUC_(τ)) at steadystate. Serum concentrations were determined using a validatedenzyme-linked immunosorbent assay (ELISA) and PK parameters werecalculated by non-compartmental analyses (WinNonlin version 5.2 orhigher, Pharsight, Mountain View, Calif.).

Immunogenicity endpoints were incidence of anti-drug antibodies (ADAs)and neutralizing antibodies (NAbs). A single assay approach with SB4etanercept tag was used to assess immunogenicity. ADAs were measuredusing validated electrochemiluminesence (ECL) immunoassays (MesoScaleDiscovery [MSD] platform) and NAbs were measured using a competitiveligand-binding assay.

Statistical Analyses

Sample size was determined using the historical data for the equivalencetest. The expected ACR20 response rate at Week 24 for both SB4 and ETNetanercept compositions was expected to be 60% from the previous ETNetanercept composition pivotal studies (Weinblatt et al., N. Engl. J.Med., 340(4): 253-259 (1999); Combe et al., Ann. Rheum. Dis., 65(10):1357-1362 (2006); and Keystone et al., Arthritis Rheum., 50(2): 353-363(2004)). Based on the expected response rate, the equivalence margin of[−15%, 15%] at Week 24 for ACR20 response rate was calculated in linewith the FDA Guidance for Industry Non-Inferiority Clinical Trials andCHMP Guideline on the Choice of the Non-inferiority Margin and was alsoaccepted by the regulatory agencies (U.S. Department of Health and HumanServices, Food and Drug Administration, Guidance for Industry:Non-inferiority clinical trials,www.fda.gov/downloads/Drugs/Guidances/UCM202140.pdf (Feb. 27 2015); andCommittee for Medicinal Products for Human Use (CHMP), Guideline on thechoice of the non-inferiority margin (EMEA/CPMP/EWP/2158/99) (Jul. 27,2005),www.ema.europa.eu/docs/en_GB/document_library/Scientific_guideline/2009/09/WC500003636.pdf(Feb. 27, 2015).

Given a two-sided a level of 0.05 and 80% power, the two-sided 15%equivalence margin required 438 patients for the per-protocol set (PPS).Assuming 20% loss of patients from the PPS, the study required a minimumof 548 randomized patients.

The primary efficacy analysis for ACR20 response at Week 24 wasperformed on the PPS in which patients completed Week 24 visit, received80-120% of both the expected number of IP injections and the expectedsum of MTX doses, and did not have any major protocol deviationsaffecting the efficacy assessment. To declare the equivalence betweenthe two treatment groups, the 95% confidence interval (CI) of theadjusted treatment difference had to be entirely contained within theequivalence margin of [−15%, 15%]. The 95% CI of the difference of ACR20response rates was estimated non-parametrically using theMantel-Haenszel weights for region while adjusting for the baseline CRP.As a sensitivity analysis, the same analysis was repeated for the fullanalysis set (FAS) with missing data at Week 24 considered asnon-responses to explore the robustness of the results. Similar analyseswere performed for ACR50 and ACR70 responses at Week 24.

In addition, the exponential time-response model for ACR20 response ratewas used to investigate the treatment difference during the time courseof the study up to Week 24 (Weinblatt et al., N. Engl. J. Med., 340(4):253-259 (1999)). Each exponential time-response model for ACR20 responserate was fitted by the non-linear mixed model for SB4 and ETN etanerceptcompositions separately, and the difference of those models and the 95%CI were calculated using the 2-norm criterion which measured the squareddifferences across all time-points. To declare the equivalence betweentwo treatment groups using the time-response models, the upper limit of95% CI of the difference between the models had to be less than thepre-specified equivalence margin, which was calculated from thehistorical data using the 2-norm criterion (Reeve et al., TherapeuticInnovation & Regulatory Science, 47(6): 641-650 (2013)).

Safety and immunogenicity endpoints were analysed descriptively on thesafety set which included all patients who received at least one dose ofstudy drug. PK endpoints were summarised descriptively on the PKpopulation which included patients in the safety set who had at leastone PK sample collected.

The analyses were performed using SAS version 9.2 software (SASInstitute, Cary, N.C., USA).

Example 3

This example describes a randomized, double-blind, parallel group,multicenter study.

The efficacy, safety, and immunogenicity of SB4 etanercept compositionprepared using the process described in Example 1 were compared to thoseof ENBREL™ etanercept product (ETN) in patients with moderate to severeRA despite MTX treatment.

Patient Disposition and Baseline Characteristics

Patient screening began in June 2013, and the 24-week evaluation of thelast patient occurred in April 2014. Overall, 777 patients werescreened, of whom 596 patients were randomized. A total of 551 patientscompleted 24 weeks of treatment and 481 (80.7%) patients were includedin the PPS (70 patients were excluded from the PPS due to protocoldeviations) (see Table 2).

TABLE 2 Protocol deviations SB4 50 mg ETN 50 mg Total N = 299 N = 297 N= 596 Protocol deviations n (%) n (%) n (%) With at least one majorprotocol 73 (24.4) 72 (24.2) 145 (24.3) deviation Excluded fromPer-protocol set 40 (13.4) 35 (11.8)  75 (12.6) Concomitant medicationcriteria 9 (3.0) 14 (4.7)  23 (3.9) Eligibility and entry criteria 7(2.3) 5 (1.7) 12 (2.0) Investigational product 9 (3.0) 2 (0.7) 11 (1.8)compliance Study procedures criteria 16 (5.4)  16 (5.4)  32 (5.4)

Patients withdrew before Week 24 mainly due to AEs (3.7%) and withdrawalof consent (2.7%) (see FIG. 1). The demographic and baseline diseasecharacteristics were comparable between treatment groups (see Table 3).

TABLE 3 Baseline demographics and disease characteristics SB4 50 mg ETN50 mg Total N = 299 N = 297 N = 596 Age (years), mean 52.1 (11.72) 51.6(11.63) 51.8 (11.67) (SD) Age group, n (%)  <65 years 253 (84.6)  262(88.2)  515 (86.4)  ≥65 years  46 (15.4)  35 (11.8)  81 (13.6) Gender n(%) Male  50 (16.7)  44 (14.8)  94 (15.8) Female 249 (83.3)  253 (85.2) 502 (84.2)  Race, n (%) White 279 (93.3)  273 (91.9)  552 (92.6) American Indian  5 (1.7)  7 (2.4) 12 (2.0)  or Alaskan Native Asian 11(3.7)  13 (4.4)  24 (4.0)  Other  4 (1.3)  4 (1.3)  8 (1.3) Weight (kg),mean 72.5 (15.93) 71.0 (14.63) 71.8 (15.30) (SD) Height (cm), mean 164.4(8.78)  164.4 (8.55)  164.4 (8.66)  (SD) BMI (kg/m²), 26.8 (5.51)  26.3(5.30)  26.6 (5.41)  mean (SD) Disease duration 6.0 (4.20) 6.2 (4.41)6.1 (4.30) (years), mean (SD) Duration of MTX use 48.2 (39.87) 47.1(40.77) 47.7 (40.29) (months), mean (SD) MTX dose (mg/week), 15.6(4.52)  15.5 (4.60)  15.5 (4.56)  mean (SD) Swollen joint count 15.4(7.48)  15.0 (7.30)  15.2 (7.39)  (0-66), mean (SD) Tender joint count23.5 (11.90) 23.6 (12.64) 23.5 (12.26) (0-68), mean (SD) HAQ-DI (0-3),mean 1.49 (0.553) 1.50 (0.560) 1.50 (0.556) (SD) Physician global 62.2(15.09) 63.2 (14.76) 62.7 (14.92) assessment VAS (0-100), mean (SD)Subject global 61.7 (18.97) 63.0 (17.70) 62.4 (18.35) assessment VAS(0-100), mean (SD) Subject pain 61.8 (20.22) 62.3 (19.22) 62.1 (19.71)assessment VAS (0-100), mean (SD) DAS28 (ESR), mean 6.5 (0.91) 6.5(0.88) 6.5 (0.89) (SD) C-reactive protein 1.5 (2.00) 1.3 (1.60) 1.4(1.81) (mg/dL), mean (SD) Erythrocyte sedi- 46.5 (22.10) 46.4 (22.62)46.5 (22.34) mentation rate (mm/h), mean (SD) Rheumatoid factor 237(79.3)  231 (77.8)  468 (78.5)  positive, n (%) BMI, body mass index;DAS28, disease activity score based on 28 joint count; ETN, referenceproduct etanercept; HAQ-DI, health assessment questionnaire-disabilityindex; MTX, methotrexate; SD, standard deviation; VAS, visual analoguescale.

Efficacy

The ACR20 response rate at Week 24 in the PPS was 78.1% for SB4etanercept composition and 80.3% for ETN etanercept composition. The 95%CI of the adjusted difference (SB4−ETN) in ACR20 response rate waswithin the pre-defined equivalence margin of [−15%, 15%] in both the PPS(95% CI: −9.41%, 4.98%) and FAS (95% CI: −5.24%, 9.07%), indicatingtherapeutic equivalence between SB4 and ETN etanercept compositions (seeFIG. 2). The time-response models of SB4 and ETN etanercept compositionsup to Week 24 in the PPS were estimated to be equivalent since thetreatment difference in terms of the 2-norm difference was 12.7 and the95% CI was (−4.6, 30.0), where the upper limit 30.0 was less than thepre-specified equivalence margin of 83.28 (see FIG. 3).

The ACR50 and ACR70 response rates at Week 24 in the PPS and FAS wereequivalent between SB4 and ETN etanercept compositions. The ACR50response rate was 46.6% vs. 42.3% and the ACR70 response rate was 25.5%vs. 22.6% in the PPS for SB4 and ETN etanercept compositions,respectively (see FIG. 2).

Subgroup analyses on the ACR response rates in PPS showed comparableresults regardless of ADA status. The proportion of patients whoachieved ACR20 response rate among patients who tested negative forantibodies against etanercept was 78.0% for the SB4 etanerceptcomposition and 81.5% for the ETN etanercept composition (95% CI:−11.12%, 3.99%) (see Table 4).

TABLE 4 Analysis of ACR20 response rate at Week 24 by overall 24-weekADA status Adjusted 24-week Difference ADA status Treatment n/n′ (%)(SE) 95% CI p-value Positive SB4 50 mg (N = 2) 2/2 (100.0) 22.14%(−54.79%, ETN 50 mg (N = 29) 21/29 (72.4) (37.095%) 99.07%) Negative SB450 mg (N = 245) 191/245 (78.0) −3.57% (−11.12%, ETN 50 mg (N = 205)167/205 (81.5) (3.846%) 3.99%) 0.292 ADA status was defined as positiveif patient had a positive test result at least once up to Week 24. Theadjusted difference and its 95% CI were estimated by analysis ofcovariance model with treatment and region as factors and baselineC-reactive protein value as covariate. ADA, anti-drug antibody; CI,confidence interval; SE, standard error.

The mean improvement in DAS28 (ESR) score from baseline was 2.6 and 2.5at Week 24 for the SB4 and ETN etanercept compositions, respectively(95% CI: −0.14, 0.28) (see FIG. 4A). The proportion of patientsachieving good or moderate EULAR response (see FIG. 4B), low diseaseactivity score, or remission (see FIG. 4C) at Week 24 according to DAS28were similar between SB4 and ETN etanercept compositions. The ACR-N atWeek 24 was 45.0% for the SB4 etanercept composition and 43.7% for theETN etanercept composition. The area under the curve (AUC) of ACR-N upto Week 24 (5822.2 vs. 5525.0) and change in DAS28 from baseline up toWeek 24 (358.3 vs. 343.5) were comparable between SB4 and ETN etanerceptcompositions.

The primary endpoint at Week 24 was met: the 95% CI of the adjustedtreatment difference between the SB4 and ETN etanercept compositions inACR20 response rate was within the pre-defined equivalence margin of[−15%, 15%]. The ACR20 responses observed in this study (73.8% for theSB4 etanercept composition and 71.7% for the ETN etanercept compositionin FAS) were within the range of ACR20 response rates reported inpivotal studies with the ETN etanercept composition (74% in Combe etal., Ann. Rheum. Dis., 65(10): 1357-1362 (2006), 72% in Genovese et al.,Arthritis Rheum., 46(6): 1443-1450 (2002), 71% in Weinblatt et al., N.Engl. J. Med., 340(4): 253-259 (1999), 59% in Moreland et al., Ann.Intern. Med., 130(6): 478-486 (1999), and 49% in Keystone et al.,Arthritis Rheum., 50(2): 353-363 (2004)).

As the primary efficacy assessment (ACR20 response at Week 24) wasevaluated at a time point in the therapeutic plateau, various efficacyendpoints and statistical methods were applied to detect anynon-equivalence in efficacy and to support the robustness of the primaryefficacy analysis. The ACR20 response rate, ACR-N, and DAS28 weremeasured at several different time points early in the treatment period.The time-response curves for the SB4 and ETN etanercept compositions upto Week 24 showing the ACR20 response over time were estimated to beequivalent and the AUC of ACR-N up to Week 24 and AUC of the change inDAS28 (ESR) from baseline up to Week 24 were comparable between the SB4and ETN etanercept compositions indicating that the efficacy of the SB4etanercept composition over time was similar to the efficacy of the ETNetanercept composition over time.

Safety

Overall, 165 (55.2%) patients treated with the SB4 etanerceptcomposition and 173 (58.2%) patients treated with the ETN etanerceptcomposition reported at least one TEAE. Frequently occurring TEAEs bypreferred term are shown in Table 5 and the most frequently reportedTEAE were upper respiratory tract infection (7.0%) and alanineaminotransferase increased (5.0%) for the SB4 etanercept composition andinjection site erythema (11.1%), upper respiratory tract infection(5.1%), and nasopharyngitis (5.1%) for the ETN etanercept composition.Most of the TEAEs were mild to moderate in severity and TEAEs consideredrelated to the study drug were reported in 83 (27.8%) and 106 (35.7%)patients for the SB4 and ETN etanercept compositions, respectively.Serious TEAEs were reported in 13 patients for each of the SB4 and ETNetanercept compositions and 34 patients discontinued treatment due toTEAE (15 [5.0%] patients vs. 19 [6.4%] patients).

TABLE 5 Treatment-emergent adverse events reported in ≥2% patients bypreferred term, n (%) SB4 50 mg ETN 50 mg Preferred term N = 299 N = 297Upper respiratory tract infection 21 (7.0)  15 (5.1)  Alanineaminotransferase increased 15 (5.0)  14 (4.7)  Nasopharyngitis 14 (4.7) 15 (5.1)  Headache 13 (4.3)  8 (2.7) Hypertension 10 (3.3)  10 (3.4) Aspartate aminotransferase increased 7 (2.3) 8 (2.7) Viral infection 7(2.3) 5 (1.7) Injection site erythema 6 (2.0) 33 (11.1) Rheumatoidarthritis 6 (2.0) 9 (3.0) Bronchitis 6 (2.0) 6 (2.0) Diarrhea 5 (1.7) 7(2.4) Pharyngitis 4 (1.3) 8 (2.7) Urinary tract infection 4 (1.3) 7(2.4) Lymphocyte count decreased 4 (1.3) 6 (2.0) Cough 3 (1.0) 10 (3.4) Erythema 2 (0.7) 10 (3.4)  Dizziness 2 (0.7) 7 (2.4) Injection site rash2 (0.7) 6 (2.0) Injection site reaction 1 (0.3) 7 (2.4)

A total of 27 patients (12 patients for the SB4 etanercept compositionand 15 patients for the ETN etanercept composition) were diagnosed atscreening with latent TB but entered the study while receiving treatmentfor latent TB. None of these patients or any other patients developedactive TB during the study. Other serious infections were reported in 1(0.3%) patient treated with the SB4 etanercept composition and 4 (1.3%)patients treated with the ETN etanercept composition. Malignancies werereported in 3 (1.0%) patients treated with the SB4 etanerceptcomposition (basal cell carcinoma, breast cancer, and lung cancermetastatic) and in 1 (0.3%) patient treated with the ETN etanerceptcomposition (invasive ductal breast carcinoma).

Injection site reactions, counted by the high-level group term ofadministration site reaction, occurred in fewer patients treated withthe SB4 etanercept composition compared to the ETN etanerceptcomposition. There were 22 injection site reaction reported in 11 (3.7%)patients vs. 156 injection site reactions reported in 51 (17.2%)patients treated with the SB4 and ETN etanercept compositions,respectively. Most of the injection site reactions occurred early(between Week 2 and Week 8) and were mild in severity and none led tostudy drug discontinuation. The proportion of injection site reactionsfor the SB4 and ETN etanercept compositions were 3.7% vs. 17.1% in ADApositive patients and 0.0% vs. 17.9% in ADA negative patients,respectively (see Table 6).

TABLE 6 Injection site reaction by overall 24-week ADA status Overall24-week SB4 (N = 299) ETN (N = 297) ADA status n/n′ (%) E n/n′ (%) EPositive 0/2  (0.0) 0 7/39 (17.9) 23 Negative 11/297 (3.7) 22 44/258(17.1) 133 ADA, anti-drug antibody; E, events; n′: number of patientswith available overall 24-week ADA assessment results; percentages arebased on n′. n: number of patients who have injection site reactionscounted by the high-level group term (HLGT) of administration sitereaction. Overall 24-week ADA result was defined as positive forpatients with at least one ADA positive result up to Week 24 after Week0.

Overall, the safety profile of the SB4 etanercept composition wascomparable with that of the ETN etanercept composition and was similarto those observed in the pivotal trials with the ETN etanerceptcomposition. There were no cases of active tuberculosis, and only 1patient treated with the SB4 etanercept composition and 4 patientstreated with the ETN etanercept composition reported serious infectionwhich is lower than 6.3% shown in ETN etanercept composition productinformation (Enbrel Summary of Product Characteristics,www.ema.europa.eu/docs/en_GB/document_library/EPAR_-_Product_Information/human/000262/WC500027361.pdf(retrieved on Feb. 27, 2015). Malignancies were reported in 3 (1.0%)patients treated with the SB4 etanercept composition and 1 (0.3%)patients treated with the ETN etanercept composition. The incidence ofmalignancy observed in this study is similar to the previously conductedstudies (Weinblatt et al., N. Engl. J. Med., 340(4): 253-259 (1999);Lopez-Olivo et al., Jama, 308(9): 898-908 (2012); and Combe et al., Ann.Rheum. Dis., 68(7): 1146-1152 (2009)).

Interestingly, injection site reactions were reported in fewer patientstreated with the SB4 etanercept composition compared to the ETNetanercept composition (3.7% vs. 17.2%). The overall incidence ofinjection site reaction occurred in this study (10.2%) is in line withpreviously conducted studies, and most injection site reactions occurredin the first month which is in accordance with the reference productlabel (Enbrel Summary of Product Characteristics.www.ema.europa.eu/docs/en_GB/document_library/EPAR_-_Product_Information/human/000262/WC500027361.pdf(retrieved on Feb. 27, 2015). There appears to be no correlation betweeninjection site reaction and ADA development, which is consistent withpreviously conducted studies (Dore et al., Clin. Exp. Rheumatol., 25(1):40-46 (2007)).

Pharmacokinetics

PK analyses were performed on 78 patients (41 patients treated with theSB4 etanercept composition and 38 patients treated with the ETNetanercept composition).

C_(trough) were comparable at each time point for the SB4 etanerceptcomposition (ranging from 2.419 to 2.886 μg/mL in Weeks 2 to 24) and theETN etanercept composition (ranging from 2.066 to 2.635 μg/mL in Weeks 2to 24) (see FIG. 5). The AUG_(τ) at Week 8 was 676.4 vs. 520.9 μg/mL andthe inter-subject variability (CV %) was 37.7% vs. 50.1% for thepatients treated with the SB4 and ETN etanercept compositions,respectively (see FIG. 6).

In this study C_(trough) and steady state PK were investigated in asubset of population to provide supporting evidence to the Phase Icomparative PK study in healthy subjects that demonstrated similar PKbehavior. In the Phase III study, the C_(trough) values were comparablebetween the SB4 and ETN etanercept compositions at each time point andAUG_(τ) at steady state was relatively higher for the SB4 etanerceptcomposition compared to the ETN etanercept composition; however thenumerical difference is likely due to an inherent high inter-subjectvariability (37.7% vs. 50.1%).

Immunogenicity

The incidence of ADA was significantly lower in patients treated withthe SB4 etanercept composition compared to the ETN etanerceptcomposition. Two (0.7%) patients treated with the SB4 etanerceptcomposition and 39 (13.1%) patients treated with the ETN etanerceptcomposition tested positive at least once up to Week 24 (p<0.001), andonly one sample from the ETN group had neutralizing capacity. The ADAsappeared early (between Week 2 and Week 8) and most of the ADAsdisappeared after Week 12.

The characteristics of antibodies detected in this study were generallytransient and non-neutralizing which is in accordance with thoseestablished with the ETN etanercept composition in previous studies ofProduct Characteristics:www.ema.europa.eu/docs/en_GB/document_library/EPAR_-_Product_Information/human/000262/WC500027361.pdf(retrieved on Feb. 27, 2015); and Dore et al., Clin. Exp. Rheumatol.,25(1): 40-46 (2011)). Since SB4 etanercept tagged single assay approachwas used to detect immunogenicity, the assay method does not seem tohave caused the lower incidence of ADA observed in patients treated withthe SB4 etanercept composition compared to the ETN etanerceptcomposition (0.6% vs. 13.1%). The lower immunogenicity of the SB4etanercept composition does not preclude classification as biosimilarbecause clinical efficacy of the SB4 and ETN etanercept compositionswere equivalent in patients with ADA negative results and no apparentcorrelation between ADA and clinical response or safety was observed(European Medicines Agency, Guideline on similar biological medicinalproducts containing biotechnology-derived proteins as active substance:non-clinical and clinical issues (EMEA/CHMP/BMWP/42832/2005) (Feb. 22,2006),www.ema.europa.eu/docs/en_GB/document_library/Scientific_guideline/2009/09/WC500003920.pdf(retrieved on Feb. 27, 2015); and Dore et al., Clin. Exp. Rheumatol.,25(1): 40-46 (2011)).

All references, including publications, patent applications, andpatents, cited herein are hereby incorporated by reference to the sameextent as if each reference were individually and specifically indicatedto be incorporated by reference and were set forth in its entiretyherein.

The use of the terms “a” and “an” and “the” and “at least one” andsimilar referents in the context of describing the invention (especiallyin the context of the following claims) are to be construed to coverboth the singular and the plural, unless otherwise indicated herein orclearly contradicted by context. The use of the term “at least one”followed by a list of one or more items (for example, “at least one of Aand B”) is to be construed to mean one item selected from the listeditems (A or B) or any combination of two or more of the listed items (Aand B), unless otherwise indicated herein or clearly contradicted bycontext. The terms “comprising,” “having,” “including,” and “containing”are to be construed as open-ended terms (i.e., meaning “including, butnot limited to,”) unless otherwise noted. Recitation of ranges of valuesherein are merely intended to serve as a shorthand method of referringindividually to each separate value falling within the range, unlessotherwise indicated herein, and each separate value is incorporated intothe specification as if it were individually recited herein. All methodsdescribed herein can be performed in any suitable order unless otherwiseindicated herein or otherwise clearly contradicted by context. The useof any and all examples, or exemplary language (e.g., “such as”)provided herein, is intended merely to better illuminate the inventionand does not pose a limitation on the scope of the invention unlessotherwise claimed. No language in the specification should be construedas indicating any non-claimed element as essential to the practice ofthe invention.

Preferred embodiments of this invention are described herein, includingthe best mode known to the inventors for carrying out the invention.Variations of those preferred embodiments may become apparent to thoseof ordinary skill in the art upon reading the foregoing description. Theinventors expect skilled artisans to employ such variations asappropriate, and the inventors intend for the invention to be practicedotherwise than as specifically described herein. Accordingly, thisinvention includes all modifications and equivalents of the subjectmatter recited in the claims appended hereto as permitted by applicablelaw. Moreover, any combination of the above-described elements in allpossible variations thereof is encompassed by the invention unlessotherwise indicated herein or otherwise clearly contradicted by context.

1. A composition comprising an anti-tumor necrosis factor (TNF)-alphapolypeptide, wherein the composition produces a reduced level ofimmunogenicity when administered to a subject.
 2. The composition ofclaim 1, wherein the anti-TNF-alpha polypeptide is an anti-TNF-alphaantibody or an antigen binding fragment thereof.
 3. The composition ofclaim 1, wherein the anti-TNF-alpha polypeptide is tumor necrosis factorreceptor (TNFR)-IgG.
 4. The composition of claim 3, wherein theanti-TNF-alpha polypeptide is a polypeptide that is an extracellularligand-binding portion of a human 75 kDa (p75) TNFR fused to an Fcregion of a human IgG1, wherein the composition produces a reduced levelof immunogenicity in the subject as compared to an ENBREL™ etanerceptcomposition with an equivalent concentration of the anti-TNF-alphapolypeptide, and wherein the composition is prepared by a processcomprising: (a) providing a mixture comprising the anti-TNF-alphapolypeptide and impurities, (b) contacting the mixture with ahydrophobic interaction chromatography (HIC) resin, such that theanti-TNF-alpha polypeptide binds to the HIC resin, and (c) eluting theanti-TNF-alpha polypeptide from the HIC resin with an elution buffer. 5.The composition of claim 4, wherein the elution buffer comprises (a)about 250-400 mM ammonium sulfate or sodium sulfate or about 450-750 mMNaCl or ammonium chloride and (b) about 10-200 mM sodium acetate, sodiumcitrate, or phosphate.
 6. The composition of claim 4, wherein theelution buffer has a pH of 3-7.
 7. The composition of claim 4, whereinthe process further comprises step (b1) prior to step (c): (b1) washingimpurities from the HIC resin with a wash buffer.
 8. The composition ofclaim 7, wherein the wash buffer comprises (a) about 500-800 mM ammoniumsulfate or sodium sulfate or about 1000-1500 mM NaCl or ammoniumchloride and (b) about 10-200 mM of sodium acetate, sodium citrate, orphosphate.
 9. The composition of claim 7, wherein the wash buffer has apH of 3-7. 10.-12. (canceled)
 13. The composition of claim 4, whereinthe reduced level of immunogenicity is a reduced level of anti-drugantibodies (ADA) and the level of ADA is reduced by 50%, 60%, 70%, 80%,90% or more relative to a subject administered an ENBREL™ etanerceptcomposition with an equivalent concentration of the anti-TNF-alphapolypeptide. 14.-19. (canceled)
 20. The composition of claim 4, whereinthe mixture of step (a) contains 8.0 ng/L or less of host cell proteins(HCP).
 21. The composition of claim 4, wherein, when high performanceliquid chromatography (HPLC) is performed on the composition, thecomposition contains a Peak 3 amount of about 12 wt. % or less.
 22. Thecomposition of claim 21, wherein the composition contains a Peak 3amount in a range of about 3.5-7 wt. %.
 23. The composition of claim 21,wherein the Peak 3 amount is reduced by 50%, 60%, 70% or more relativeto the Peak 3 amount contained in the ENBREL™ etanercept compositionwith an equivalent concentration of the anti-TNF-alpha polypeptide andsubjected to HPLC under the same conditions. 24.-26. (canceled)
 27. Thecomposition of claim 4, comprising 10 mg/mL to 100 mg/mL of theanti-TNF-alpha polypeptide.
 28. The composition of claim 4, comprising50 mg/mL of the anti-TNF-alpha polypeptide.
 29. The composition of claim4, wherein the concentration of misfolded and aggregated forms of theanti-TNF-alpha polypeptide in the composition is reduced by 50%, 60%,70%, 80%, 90% or more relative to the concentration of misfolded andaggregated forms of etanercept in the ENBREL™ etanercept composition.30.-33. (canceled)
 34. The composition of claim 4, wherein theconcentration of high molecular weight compounds in the composition isreduced by 50%, 60%, 70%, 80%, 90% or more relative to the concentrationof high molecular weight compounds in the ENBREL™ etanerceptcomposition. 35.-38. (canceled)
 39. A method of treating a disorder inwhich a TNF-alpha activity is detrimental in a subject comprisingadministering a therapeutically effective amount of the composition ofclaim 4 to the subject.
 40. The method of claim 39, wherein the disorderis selected from the group consisting of polyarticular juvenileidiopathic arthritis (JIA), psoriatic arthritis, plaque psoriasis, andankylosing spondylitis.
 41. The method of claim 39, wherein the disorderis rheumatoid arthritis.
 42. The method of claim 39, wherein thecomposition is administered subcutaneously.
 43. The method of claim 39,wherein the subject has a reduced level of ADA relative to a subjectadministered an ENBREL™ etanercept composition with an equivalentconcentration of the anti-TNF-alpha polypeptide.
 44. The method of claim39, wherein the level of ADA is reduced by 50%, 60%, 70%, 80%, 90% ormore relative to a subject administered an ENBREL™ etanerceptcomposition with an equivalent concentration of the anti-TNF-alphapolypeptide. 45.-48. (canceled)